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With AlGaN and AlGaInN, even shorter wavelengths are achievable. Around-UV emitters at wavelengths all over 360–395 nm are by now low cost and sometimes encountered, by way of example, as black gentle lamp replacements for inspection of anti-counterfeiting UV watermarks in paperwork and bank notes, and for UV curing. Significantly https://focusz.de/beleuchten-sie-ihren-raum-die-geschichte-und-kunstfertigkeit-der-leuchtreklamen/

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